I can see a compromise Awp ratio or like #of Players/2= total number of Awps in total. so 15 players, 8 awps 4 per team. 20 players, 10 awps, 5 per team, 16 players 8 awps 4 per team, 18 players still 8 awps 4 per team.
basically 10-20 players 3-5 awps per team(10,11,12 being 3 awps, 13-18, 4 awps, 19,20, 5 awps) 20-30 Players 5-7 awps per team.